Cook spaghetti by first bringing water to boil in a pot, then add spaghetti and cook according to package instruction (typically 8 to 12 minutes).
For the sauce, place the tomato paste in another pot, add the water, and mix until it becomes sauce-like in texture. Add salt and herbs, stir and begin to heat.
Slice serrano pepper very thin and into tiny pieces; and add to the sauce and cook covered around simmer-medium heat for at least 8 minutes, stirring occasionally.
For the topping, sliced tomatoes, avocado, and finely sliced raw serrano pepper.
Once everything has cooked, add and mix most of the sauce into the spaghetti, leaving a little sauce in the pot to add to each dish later. Put desired amount of spaghetti in a plate, pour some extra tomato sauce on top; and add raw toppings. Serve and enjoy.
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2 6-ounce cans of tomato paste
water
4 teaspoon Italian seasoning herbs (no garlic)
1 teaspoon salt or more, to taste