Tomato and Feta Salad


1 1/2 c. crumbled feta cheese (7 oz.)
1/4-1/2 c. chopped onion
1 1/2 tsp. vegetable oil
1 tsp. dried whole oregano
6 med. tomatoes (about 2 1/2 lb.), cut into wedges
Boston lettuce leaves

Combine first 5 ingredients; toss gently.
Cover and refrigerate at least 2 hours.
Spoon onto Boston lettuce.