Step 1: Preheat Oven
Set oven to 350°F (175°C).
Step 2: Caramelize Onions
In a large oven-safe skillet or Dutch oven, heat olive oil and butter over medium heat. Add onions and cook, stirring occasionally, until soft and golden brown, about 20–25 minutes.
Step 3: Add Garlic
Stir in minced garlic and cook for 2–3 minutes until fragrant.
Step 4: Add Brats and Liquids
Nestle bratwursts among the onions. Pour in beer and beef broth, ensuring brats are mostly covered. Stir in Dijon mustard, salt, and pepper.
Step 5: Braise in Oven
Bring mixture to a simmer on the stovetop, then transfer skillet to oven. Bake uncovered for 30–40 minutes, or until brats are cooked through and infused with flavor.
Step 6: Serve
Garnish with chopped parsley if desired and serve hot.
Variations & Tips
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Add sliced bell peppers with the onions for extra color.
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Use a hoppier beer like IPA or a pinch of red pepper flakes for more spice.
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For a touch of sweetness, stir in a spoonful of brown sugar during onion caramelization.
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Leftovers can be sliced into sandwiches or served over pasta.
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