The Best Vegan Green Bean Casserole

Ingredients (for 8 servings)

• 1 whole — yellow onion
• 1 tbsp — flaxseed
• 2 pinch — sea salt
• 2 pinch — black pepper
• 24 oz — green beans
• 1 tbsp — almonds
• 1 whole — yellow onion
• 16 oz — mushrooms
• 6 clove — garlic
• 0.33 cup — oat flour
• 2 cup — vegetable broth
• 2 tbsp — white wine vinegar
• 1 tbsp — Italian seasoning
• 0 — Sea salt and freshly ground black pepper