Oven Roasted Tilapia With Tomatoes, Pesto And Lemon Recipe - Food.com - 290644 You can use other fish, I just so happened to have tilapia on hand. Get some clams and clean the shells really well. Toss them in the pan with the tomatoes after you've roasted them. Stick them back in the oven for about 8 minutes, stirring every so often so the mixture can get into the shells as they open. Remove from oven and follow the rest of the recipe, laying the fish on top of the clam shells. I had a brilliant dish, similar to this one except with tuna, in Spain a few years back. I should see if I can find a recipe for that, although it's close. Also love them sauteed in white wine and butter.