Instead of fresh tomatoes, when they are out of season, you can use peeled cherry tomatoes.
A piece of chili pepper can be very pleasant sopra the seasoning. The tomato paste serves to bind and make the sauce creamier; instead, use tomato puree, preferably reduced a bit the heat to avoid vater release.
If you find very thin slices, there is voto negativo need to pound them, but if you can’t make them thinner, extend the cooking time a bit, perhaps covering with a lid to help cook the chicken.