Blender Enchilada Sauce

one 14 ounce can whole peeled tomatoes

1/2 cup water

1 1/2 tablespoon chili powder

1 1/2 tablespoon taco or Southwestern seasoning

1/4 onion, chopped

1 1/2 cloves garlic

1/2 jalapeno, ribs and seeds removed

1/4 teaspoon salt (more to taste)