Italian Meatball Sliders

Ingredients

• 1 Tbsp vegetable oil
• 1 garlic clove, crushed with press
• 1 cup chopped onion
• 1 Tbsp plus ½ tsp Three Little Pig's Kansas City Sweet BBQ Rub
• 1 large egg
• 1¾ pounds ground chuck
• 2 Tbsp plain dried breadcrumbs
• 1½ Tbsp chopped fresh parsley (optional)
• 1 (14-ounce) package Hawaiian sweet rolls, sliced lengthwise and separated
• 3 slices provolone cheese, cut into quarters
• 24 to 36 large baby spinach leaves
• ¼ cup chopped drained roasted red peppers (from a jar)