7-Ingredient Veggie Sliders

Bahan-bahan (10 porsi)

• 1/2 red onion ((finely diced // 1/2 onion yields ~3/4 cup))
• 6 button or baby bella mushrooms ((diced // 6 mushrooms yield ~1 1/4 cups))
• 1 pinch each salt and pepper
• 1 15 -ounce can kidney (or black) beans ((well rinsed and drained))
• 3/4 cup cooked quinoa
• 1 Tbsp (yes, Tablespoon) chili powder ((or sub cumin))
• ~1/2 cup raw walnuts ((crushed or ground into a loose meal // divided))
• 1 shake vegan Worcestershire or A-1 sauce