Salisbury Steak Meatballs (Instant Pot, Stove Top, Slow Cooker)

Bahan-bahan (4 porsi)

• 2 tsp olive oil (divided)
• 1/2 cup minced onions
• 1/2 lb 93% lean ground beef
• 1/2 lb 93% lean ground turkey
• 1/3 cup whole wheat seasoned breadcrumbs
• 1 larege egg (beaten)
• 2 tablespoons tomato paste (divided)
• kosher salt
• pinch black pepper
• 1 tbsp all-purpose flour
• 1 tsp red wine vinegar
• 2 tsp Worcestershire sauce (to taste)
• 1/4 tsp mustard powder
• 5 oz sliced mushrooms
• 1 1/4 cup reduced sodium beef broth
• chopped parsley for garnish (optional)