Cook 2 cups of rice and let it cool slightly
Dice onion, carrot, and any other desired vegetables
Heat oil or butter in a pan
Sauté the onion and vegetables until softened
Add cooked rice to the pan
Season with salt, pepper, and ketchup
Mix well and cook until evenly coated
Set the rice aside on a plate
Beat 2 to 3 eggs in a bowl
Heat butter in a nonstick pan over medium heat
Pour in the beaten eggs
Stir gently until mostly set but still soft
Place the rice mixture in the center of the omelet
Fold the omelet over the rice
Slide onto a plate
Top with ketchup if desired