French Onion Tartine - BriarPatch Food Co-op

Name: French Onion Tartine - BriarPatch Food Co-op
Ingredients: 1 lb crimini mushrooms, thinly sliced; 2 cloves garlic, minced; 2 lb sweet onions, halved lengthwise and thinly sliced; 1 bay leaf; ¼ tsp dried thyme; ¼ cup dry white wine; ¼ tsp Worcestershire sauce; ½ tsp Sherry vinegar; 6 oz Gruyère cheese, grated; ¼ cup grated Parmesan; 1 tsp salt, divided; ½ tsp pepper, divided; 3 Tbsp butter; 3 Tbsp olive oil, divided; ½ tsp sugar; ½ cup mayonnaise; 1 Tbsp Dijon mustard; 4 deli sandwich rolls (like Mexican bolillo bread), or wide baguette bread (1 1/3 baguette); Optional: Truffle hot sauce, fresh chopped parsley – for serving

briarpatch.coop

The flavors of French Onion Soup, but in a shroom-filled sammie! Truffles are a type of fungi that grows underground. Not a mushroom per se, but the earthy-umami vibe is big and bold in these knobby,...

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Ingredients

1 lb crimini mushrooms, thinly sliced
2 cloves garlic, minced
2 lb sweet onions, halved lengthwise and thinly sliced
1 bay leaf
¼ tsp dried thyme
¼ cup dry white wine
¼ tsp Worcestershire sauce
½ tsp Sherry vinegar
6 oz Gruyère cheese, grated
¼ cup grated Parmesan
1 tsp salt, divided
½ tsp pepper, divided
3 Tbsp butter
3 Tbsp olive oil, divided
½ tsp sugar
½ cup mayonnaise
1 Tbsp Dijon mustard
4 deli sandwich rolls (like Mexican bolillo bread), or wide baguette bread (1 1/3 baguette)
Optional: Truffle hot sauce, fresh chopped parsley – for serving