Turkey Spinach Sliders

Ingredients

• 1/2 bunch flat-leaf spinach, thick stems removed, leaves chopped (about 4 cups)
• 4 scallions, thinly sliced
• 1 garlic clove, finely chopped
• 1 pound ground turkey
• 3/4 teaspoon ground cumin
• Kosher salt, freshly ground pepper
• 3 tablespoons olive oil
• 12 slider buns or small dinner rolls, split, lightly toasted (for serving)
• Mayonnaise, sliced red onion, and pickle slices (for serving)