Prepare the Jam: Combine tomato puree and frozen strawberries in a roasting pan. Add sugar and mix well. Roast in a 400°F oven until it reaches a dense, jammy consistency.
Toast the Bread: Toast slices of rye bread under the broiler in the oven, toasting one side to create a mix of textures.
Assemble: Spread ricotta cheese on the toasted rye bread, add a layer of the tomato-strawberry jam, and finish with a sprinkle of salt and freshly ground black pepper.