Kraft Singles Sliders - CTown Supermarkets

Ingredients

• 1 red onion, cut into 1/2-inch-thick slices
• 1 tomato, cut into 1/2-inch-thick slices
• 2 tsp extra virgin olive oil
• 1 lb lean ground beef
• 1 tbsp dried oregano leaves
• 4 American Cheese Slices, halved
• 8 slider buns, split
• 2 tbsp HEINZ Balsamic Vinegar
• 2 tbsp fresh lemon juice
• 24 baby spinach leaves