Salsa

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