Yummy Pasta with Tomato Sauce

What happens when you feel like cooking, but wanna cook something easy? THIS IS WHAT YOU MAKE. i was in the mood for some pasta, so i whipped up a batch of tomato sauce. After i realised, why not add some other ingredients? i opened the fridge and found cheese slices and bell peppers. i stirred it in, and the product was the best easy cheese pasta EVER!!
Okay, here it is:

2 tomatoes
1 small onion
2 cloves crushed garlic
1/4 bell pepper (cubed)
2 slices cheese, or 1/2 cup grated chedder/parmasan
1 cup any pasta (if you are making pasta for kids, buy the funky kind. I always LOVE funky pasta instead of the same old boring kind)
2 tbs tomato concentrate
1/2 teaspoon salt
2 teaspoons oregano
1 tsp chilli powder (optional)

Method:
Boil the pasta in 2 cups water.(add some salt, and when cooked, do not drain yet.)
Finely chop the onions and tomatos. Put some olive oil in a pan and saute the crushed garlic and the chopped onions till the onions are soft and brown. Add the chopped tomatoes, and stir for about 5 min. Add the tomato paste, chilli powder, (optional) salt, and oregano. Stir until the mixture looks more like a sauce rather than clumps. Turn off the heat and add the cheese (if using slices) and the green pepper. Drain the pasta, and put the pasta back in the pan, making sure there is no water in the pan. Put the sauce in with the pasta, and stir till well combined.
Serve. (If using parmasan cheese, top pasta with cheese when serving. I like to put extra cheese :-) )