I have mentioned tomato paste several times, a great product to keep on hand and stocked. The 170 gram (6 oz) small cans are ideal (these are what used to be available in my location now we only have the 220 gram (7 3/4 oz) cans), and it is universal. Always buy Thai product vice an import, 1. You are helping the companies here, 2. You are saving money.
You can make all of this from tomato paste:
Tomato Puree, easy, place 2 tablespoons of paste in a measuring cup, add water to the 1 cup mark. Pour this into a bowl and whisk to remove any lumps, now you have tomato puree to use in recipes that call for that.
Tomato Sauce, easy, 1 can of paste, 2 cans of water, whisk, a little bit of sugar, and some spices like salt, pepper, oregano, thyme, etc, and you have tomato sauce. (For spices I simply use 2 tablespoons of Italian seasoning, works perfect.)
Pizza Sauce, easy, 1 can of paste, 2/3 cup water, 1/4 cup olive oil, salt to taste, 1/2 teaspoon dried oregano, 1/2 teaspoon dried basil, 1/2 teaspoon dried rosemary, 1/2 teaspoon garlic powder. Mix well, can add black pepper to taste as well. Refrigerate for several hours before use to let the flavors blend.
Tomato Juice, easy, 1 can of paste, 4 cans of water, whisk. Add a touch of sugar, salt and pepper. Perfect. I use this a lot for the chili I make and sometimes just to enjoy a cold glass of juice.
Tomato Soup, easy, 1 can of paste, 4 cans of milk, pinch of salt, teaspoon of sugar or honey and heat in a sauce pan, optional items to add is 1/4 teaspoon garlic powder, 1 teaspoon of Parmesan cheese, 1 teaspoon of cooked and crumbled bacon, 1 teaspoon of onion powder, 1 teaspoon of celery seed. A can of paste costs 17 Baht, a can of tomato soup costs 50+ Baht.
Honey-based Ketchup, 1 can of tomato paste, 1/4 cup honey, 1/2 cup white vinegar, 3/4 teaspoon salt, 1/4 teaspoon onion powder, 1/8 teaspoon garlic powder. Mix in a sauce pan on medium heat, when it comes to a boil reduce to a simmer for 20 minutes, stirring often, then remove from heat and cover until cool. Chill and store in the fridge.