Bip's Ripe Tomato Relish
In peeling the tomatoes, it's very helpful to place each tomato in a pot of boiling water, removing them with a large slotted spoon after about 1 minute. As the tomatoes cool, the skin slides off very easily in large sections.
After simmering the apples for about 20 minutes, I use a potato masher to press the remaining apple pieces against the bottom/sides of the pot to aid in their disintegration. Since I much prefer the relish a little on the chunky side, I've resisted the temptation to use a hand-held blender or food processor.