Buffalo Tempeh Sliders

Ingredients (10)

• ✓ 3 (8 ounce) packages tempeh, cut into 2-inch strips
• + 2 (12 fluid ounce) bottles Buffalo wing sauce (such as Frank's® RedHot) add to pantry
• ✓ 1 tablespoon vegetable oil
• + 1 cup crumbled blue cheese, or more to taste add to pantry
• + 1 cup chopped fresh cilantro add to pantry
• + 1 large green bell pepper, diced add to pantry
• + 2 stalks celery, diced, or more to taste add to pantry
• + ¼ red onion, diced add to pantry
• + 1 (5.3 ounce) container Greek yogurt, or as needed add to pantry
• ✓ 18 pita pockets, or more to taste