Spinach Stuffed Baked Tomatoes

4 med. tomatoes
1/8 tsp. salt
1 (10 oz.) pkg. frozen chopped
spinach, cooked
1/2 c. grated Parmesan cheese, divided
2 tbsp. mayonnaise
2 tsp. grated onion
1/8 tsp. salt
1/8 tsp. pepper

Slice off top of each tomato; scoop out some of the pulp, leaving shells intact. Sprinkle shells with 1/8 teaspoon salt. Invert on paper towels to drain. Drain cooked spinach. Press out excess liquid with back of spoon. Put spinach in blender or food processor and add 1/3 cup Parmesan cheese and remaining ingredients. Pulse several times or until mixture is well blended. Fill tomato shells with spinach mixture. Place in a 1 quart casserole and sprinkle with remaining cheese. Bake, uncovered, at 400 degrees for 15 minutes or until heated. Yield: 4 servings.

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