Velvety Baked Pimento Cheese Dip

VELVETY BAKED PIMIENTO CHEESE DIP1 (10-oz.) block sharp Cheddar cheese, shredded1 (10-oz.) block extra-sharp Cheddar cheese, shredded1 T. cornstarch8 bacon slices, cooked and crumbled½ small onion, finely grated1 c. Miracle Whip or mayo2 (4-oz.) jars diced pimento, drained1 T. Worcestershire…