Supper with Stella

Ingredients

• 2-3 Tbsp. olive oil
• 1 red onion, sliced lengthwise
• 1 can black beans, rinsed and drained
• 1 can red kidney beans, rinsed and drained
• 1/4 cup nutritional yeast
• 4 hamburger buns
• 4 slices white cheddar
• 2 large roasted red peppers, halved
• sliced pickles
• salt & pepper, to taste
• 4 oz. feta
• 1/4 cup Greek yogurt
• 2 Tbsp. mayonnaise
• 2 Tbsp. buttermilk (milk will do if you don't have buttermilk)
• 1 tsp. white wine vinegar
• 1/4 tsp. garlic powder