Salsa - cooking recipe

Ingredients

6 lb. firm ripe tomatoes (about 12 large)
1 lb. onions (about 2 large)
1 lb. green peppers (about 2 large)
1 large red pepper
1 1/2 c. distilled white vinegar
1 Tbsp. plus 1 tsp. salt
2 tsp. dry mustard powder
2 tsp. granulated sugar
2 tsp. chili powder
1 tsp. garlic powder
3/4 tsp. ground cumin
1/2 tsp. ground black pepper
1/8 tsp. crushed red pepper flakes

Preparation

Peel, chop and seed tomatoes; allow to drain in a colander.