Combine two rolls into one ball and place on a greased baking sheet that has been sprayed with non-stick cooking spray. Shape remaining rolls into petals and place around center. Spray dough with non-stick spray. Cover with plastic wrap. Let dough rise in a warm place for 1 hour or until doubled in size. Remove plastic wrap and spray dough once more. In a small bowl, combine grated lemon and sugar. Sprinkle sugar mixture over dough. With you finger, make an indentation in the center of each petal. Spoon a teaspoon of jam in the center of each petal. Bake in a 350-degree oven for 15-20 minutes or until golden brown. Remove and let cool.