To prepare a awesome rhubarb and strawberry pudding recipe, first you need to gather your ingredients. First, you will need the following ingredients: 1 1/2 cups chopped fresh or frozen strawberries, 1 cup sugar, 2 tablespoons butter, and 1 teaspoon vanilla extract. If you don't have fresh strawberries you can use frozen, but if you want to make your own, then you'll need 2 cups of sugar. You will also need 1/4 cup of water. Add the sugar to the water and stir until it's completely dissolved. Pour the mixture into the saucepan and cook over medium heat, stirring constantly, until thickened, about 10 minutes. Remove from the heat and set aside to cool. In the meantime, preheat the oven to 375 degrees F (190 degrees C) and prepare the pudding mix as directed on the back of the box. Place the cooled pudding in an airtight container and refrigerate until you are ready to serve it.