I kinda dry my own tomatoes....
By the end of summer I have an abundance of tomatoes and can't keep up.
So - I slice them in half (I do this to all the tomatoes - not just Romas)
Drizzle both sides with olive oil and salt and pepper
Place on a rack
Place rack on a foil lined baking sheet (easy clean up)
Place in an oven at 350 degrees for however long it takes. The tomatoes collapse, roast and the longer you let them in there, the more they "dry out" and concentrate. I flip them once or twice for even roasting.
Now - this isn't your typical "dehydrated tomatoes" but it sure does make yummy tomatoes. If I can't use them immediately, I then cool and stick in the freezer.
I've used them as toppings for pizza, chopped and in pasta sauce, topping for cooked fish, in salads, etc.