Alice's Shrimp Scampi

ALICE’S SHRIMP SCAMPI¼ c. butter½ c. extra virgin olive oil1 large onion, chopped½ of each bell pepper, chopped (red, orange, yellow, green)3 stalks celery, chopped2 T. minced garlic2 lbs. medium to large shrimp, peeled, butterfly (you can leave tails on…