To prepare a strawberry rhubarb betty desserts recipe, first you need to gather your ingredients. First, you'll need the following ingredients: 1 cup strawberry jam 2 tablespoons sugar 2 teaspoons vanilla 2 tbsp. lemon juice Instructions: Preheat the oven to 350 degrees F (180 degrees C) and grease and flour two 9x5-inch baking pans. Cut the strawberries in half lengthwise, then cut the berries into quarters, reserving the pits for later. Place the sugar, butter, and vanilla into the mixing bowl. Beat the mixture with an electric mixer until it's light and fluffy, about 2 minutes. Add the eggs and beat until they're combined. Pour in the vanilla and sugar mixture and mix until the batter is just combined and no streaks of vanilla are visible. Sift the flour and baking powder together and stir in 1 tablespoon of the strawberry mixture, 1 teaspoon of salt and 1/4 teaspoon each of cinnamon and nutmeg. Mix the wet ingredients together with the dry ingredients until everything is evenly coated. Bake for 30 to 35 minutes, or until browned and bubbly. Allow the cake to cool before removing it from the pan. Serve with ice cream or whipped cream.