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One-Pot French Onion Pasta
20
min active
·
6
servings
·
35
min total
Rich one-pot pasta with deeply caramelized onions and savory broth in 35 minutes.
Avo's Tip
Caramelize, don’t sauté: Keep the heat at medium and stir often—deep golden onions (not pale or burnt) are the flavor backbone of this dish.
Use a wide pan: A broad skillet or shallow Dutch oven helps onions caramelize evenly and lets pasta cook in a single layer.
Stir while simmering: Give the pasta a few stirs as it cooks so it releases starch and the sauce turns glossy, not watery.
Add cheese off heat: Lower the heat before stirring in cheese to prevent clumping or a greasy texture.
Loosen before serving: If the pasta thickens too much, splash in warm broth or water and stir until silky again.
No Gruyère? Swiss cheese or provolone melt just as well.
Want it vegetarian? Vegetable broth swaps directly for beef broth.
No white wine? Extra broth plus ½ tsp apple cider vinegar replaces the acidity.
COMMON QUESTIONS
Frequently Asked Questions
Everything you need to know before you start cooking.
Can I make this ahead of time?
Yes. You can cook it fully, cool it, and refrigerate for up to 3 days. Reheat gently with a splash of broth or water to restore the sauce’s creamy texture.
What’s the best cheese substitute if I don’t have Gruyère?
Low-sodium mozzarella works well for melt, or use a mix of mozzarella and Swiss-style cheese for similar flavor without overpowering saltiness.
Why does my sauce look too thick or too loose?
Pasta sauces naturally tighten as they sit. If it’s too thick, stir in warm liquid a tablespoon at a time; if too loose, simmer uncovered for 1–2 minutes to reduce.
Storage & Reheating
Fridge: Store in airtight container up to 3 days.
Reheat: Reheat gently on the stovetop with a splash of broth or water to loosen the sauce.
Why It Works
Uses one pot and simple pantry ingredients, with the pasta cooking directly in the sauce so there’s no draining, no extra pans, and very little cleanup—just slow-cooked onions, a short simmer, and a quick cheese finish.
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Ingredients
1
4 cups (480 ml) low-sodium vegetable broth
2
2 large yellow onions, thinly sliced
3
3 cloves garlic, minced
4
1 tsp fresh thyme leaves (or ½ tsp dried)
5
½ tsp black pepper
6
2 tbsp olive oil
7
½ cup (120 ml) unsweetened oat milk or whole milk
8
¾ cup shredded Gruyère or low-sodium mozzarella
9
¼ cup finely grated Parmesan
10
12 oz rigatoni pasta
13
1 tsp dried thyme (or 3–4 sprigs fresh thyme)
15
1 cup (240 ml) water
16
Optional garnish: extra thyme, chili flakes
Instructions
1
Heat olive oil in a wide skillet or Dutch oven over medium heat. Add onions and cook 12–15 minutes, stirring often, until deeply golden and caramelized.
2
Add garlic, thyme, and black pepper. Cook 30 seconds until fragrant.
3
Add rigatoni, vegetable broth, water, and oat milk. Stir well.
4
Bring to a simmer, cover, and cook 10–12 minutes, stirring occasionally, until pasta is al dente and sauce is glossy.
5
Reduce heat to low. Stir in Gruyère and Parmesan until melted and stretchy.
6
Taste and adjust seasoning if needed. Serve immediately.
7
Color = flavor: Don’t rush the onions. Deep caramelization is what makes this dish taste luxurious.
8
Pasta choice matters: Rigatoni or mezzi rigatoni holds the sauce best.
9
Extra stretch: Cover the pan for 1 minute after adding cheese to maximize melt.
10
Extra Cheesy: Add an extra ¼ cup mozzarella before serving.
Quick Fixes
Pasta sticking: Stir every 2–3 minutes and make sure there's enough liquid — add a splash of broth if the pasta absorbs too fast.
Onions not caramelized: Don't rush this step. 12–15 minutes on medium heat is non-negotiable for deep flavor.
Too salty: Use low-sodium broth and taste before adding any seasoning — the cheese and broth carry a lot of salt already.
ingrediENTS
—
1
4 cups (480 ml) low-sodium vegetable broth
—
2
2 large yellow onions, thinly sliced
—
3
3 cloves garlic, minced
—
4
1 tsp fresh thyme leaves (or ½ tsp dried)
—
5
½ tsp black pepper
—
6
2 tbsp olive oil
—
7
½ cup (120 ml) unsweetened oat milk or whole milk
—
8
¾ cup shredded Gruyère or low-sodium mozzarella
—
9
¼ cup finely grated Parmesan
—
10
12 oz rigatoni pasta
—
13
1 tsp dried thyme (or 3–4 sprigs fresh thyme)
—
15
1 cup (240 ml) water
—
16
Optional garnish: extra thyme, chili flakes
instructions
1
Heat olive oil in a wide skillet or Dutch oven over medium heat. Add onions and cook 12–15 minutes, stirring often, until deeply golden and caramelized.
2
Add garlic, thyme, and black pepper. Cook 30 seconds until fragrant.
3
Add rigatoni, vegetable broth, water, and oat milk. Stir well.
4
Bring to a simmer, cover, and cook 10–12 minutes, stirring occasionally, until pasta is al dente and sauce is glossy.
5
Reduce heat to low. Stir in Gruyère and Parmesan until melted and stretchy.
6
Taste and adjust seasoning if needed. Serve immediately.
7
Color = flavor: Don’t rush the onions. Deep caramelization is what makes this dish taste luxurious.
8
Pasta choice matters: Rigatoni or mezzi rigatoni holds the sauce best.
9
Extra stretch: Cover the pan for 1 minute after adding cheese to maximize melt.
10
Extra Cheesy: Add an extra ¼ cup mozzarella before serving.
High comfort. Low effort. Designed for real weeknights.
RECIPE
One-Pot French Onion Pasta
20
min active
·
35
min total
·
6
servings
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