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["Pre-heat oven to 180 C/350 F.", "Before slicing the peppers in half, take a look at them to determine the most sensible side to do this from - they need to sit flat on the tray. Pointed peppers tend to be sort of flat and wide - they have a narrower side which is where they are best sliced from. I find that if I lay one down so that it lies flat and then give it a quarter turn, that is the best place to slice them in half - it gives me two fairly stable and wide halves. After you have sliced them in half, remove the seeds and the white membrane but try and leave the stems on as they look rather pretty. If there are any rogue seeds, hold the pepper half over the sink, cut side facing down and give it a little tap or two with the flat of the knife and the seeds should fly out. Nestle the prepared peppers in a baking dish which will hold them snugly. The tin that I use is 7"" x 10"" (which is 26cm x 17cm) and comfortably holds 4 halves.", "Smear 1 generous teaspoon of pesto into each half. Slice the tomatoes in half and nestle, cut side down, into the pesto - put in as many as you can squeeze in. When I can find them I also use a few yellow cherry tomatoes.", "Slice the feta into cubes and divide this evenly over the tomatoes.", "Trickle over a little extra virgin olive oil and pop in the oven for 20-25 minutes.", "Serve warm or at room temperature; as a side with a roast or cold in a lunch box with a salad. This is delicious picnic fare with a lentil salad and also on toasted slices of baguette...", "SUBSTITUTIONS