Preheat the oven at 350 degrees Fahrenheit (180 degrees Celsius)
Finely chop all the vegetables.
Heat the oil in a large sauce pan and sauté all your vegetables at low heat for about 15 minutes.
Add the garlic and sauté until you start smelling the garlic.
Add the tomato sauce, oregano, basil, pepper and salt to taste.
Simmer for about 15-20 minutes.
In a medium baking dish/pan that is about 12 x 9 inches, spread 1-2 tablespoons of the sauce. Lay on the sauce 3 lasagna noodles, then pour over a generous amount of sauce and sprinkle over that the feta and parmesan. Lay another 3 lasagna noodles and repeat with sauce and cheese and on the final layer spread some more pasta sauce with a bit of parmesan if you want.
Bake for about 20-30 minutes covered and 5-10 minutes uncovered (pasta should be soft-but don't let pasta dry out). Serve with some sauce poured on top.