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 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 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.
