Thanks for playing, everyone!
I'm going to give the virtual prize

to eli, whose solution is the only practical one I didn't think of and which I'd have liked. (Good second, aschie30, but second is second.) Runner up to gastro gnome with extra kudos for providing a real recipe. I like Josphine's idea a lot, too, but I don't think it meets the time limit. I didn't have any ricotta, either, though I did have cottage cheese.
Mhays, your solution is the one I thought of first. But a bowl of tomatoes didn't really seem like dinner. I also thought of a pasta or couscous dish as suggested by kennyz, tyrus, Pie Lady and leek but I wasn't in the mood (also, pasta is not the easy meal in our house that it is in most people's, because I need to haul bottled water and wait forever for it to boil on my terrible iron-plate electric stove).
I didn't think the bread, even toasted, would hold up to panzanella, as suggested by tyrus and lgordon, and with no herbs or other vegetables, it wouldn't very interesting. I do like petermavrik's idea of frying the bread -- it didn't occur to me -- but if I'd had a cucumber, onion or radish a lot of other options would have been possible.
kanin, even if we were to grant you ultra tex 3 as a pantry staple, could you really make pasta from scratch and get it on the table in half an hour?
My original thought for the tomatoes was an extra-tomatoey tabbouleh, but the parsley was beyond help and what is tabbouleh without parsley? I didn't want to cook the tomatoes because fresh-tomato season is nearly at an end. I can cook with canned tomatoes.
DeathByOrca hit on the combination of ingredients I used, though I put them together differently. I made what you might call deconstructed BLTs.
These were really very good, kind of a cross between open-faced sandwiches and a salad. It solved the usual problem of how to eat a BLT without squirting and dripping parts down your front. The tomato-soaked toast was
so good. And those of you who think bacon is overrated are just wrong. I only had three slices of bacon on hand -- if I made this again I'd use more.
It didn't use all the tomatoes I had cut up, though, so we have
Real Reality Cooking Challenge No. 2.
Deconstructed BLTs3 slices bacon (more would be better)
3 slices whole-wheat bread
Mayonnaise to taste (I actually used Miracle Whip, but I know how some of you feel about it)
2-3 cups roughly cut-up ripe tomatoes, with juices
1 cup torn-up iceberg lettuce
Sea salt, celery salt and freshly ground pepper to taste
Cook the bacon crisp and set aside. Toast the bread, smear with mayo and cut diagonally in half. Arrange on a plate and pour the tomatoes and their juices over the top. Top with the lettuce and then crumble the bacon over all. Season to taste and eat with knife and fork. 1-2 servings.