tomatoes and
peppers cannot be crossed
they are in the same family, but far too dissimilar as species
If this were emenly remotely possible, it would have been observed in the past if in no other case than that of accidental crossing in gardens or agricultural sites
their are instances of grafting tomato scions onto
potato roots to avoid certain disease issues, but mind you, this is grafting, not crossing or in any way blending the genetic material
any "cross" between tomatoes and
peppers,
potatoes or any other two unique species would only be possible through gene splicing
their are interspecial crosses that occur between tomatoes of 2 different species, or, between
peppers of 2 different species, but even within the
peppers, their occurs at least one species which has never been shown to cross with other species of
peppers