There are many recipes. This is my slow version.
Start with onions, bell peppers, tomatoes, and paprika. As a side for four people start with two onions, three large bell peppers or more smaller ones (use green, yellow and red if you can) and about six nice tomatoes (you can use tinned, or frozen* or a mix).
What works for me is (1) slice the onions really thin. Mandolin thin. I expect you can stick them through a food processor if that’s your thing. Then (2) low and slow — 40 minutes to an hour at low heat in some left-over fat** until the onions are soft but still on the white side.
Off the stove, stir in two tablespoons of decent sweet paprika, then add the thinly sliced bell peppers and maybe some water and back on the stove for another half hour or more, until the peppers are soft.
Meanwhile chop the tomatoes and season. When you figure the peppers are soft enough, dump in the tomatoes and juice, and give it another 20 minutes. Stick a lid on it if it’s going dry.
This goes well with Pörkölt, but you can make it into a main meal too.
* You buy lots of tomatoes when they’re cheap and freeze them, right?
** You save the fat from pan-frying steaks or pork chops or chicken, right? Right?