Mix eggs and pasta sauce until blended. Drain spaghetti, reserving 1/4 cup cooking water. Return spaghetti to pan. Add shallot mixture; mix lightly. Cook on low heat 1 min., stirring occasionally. Gradually add pasta sauce mixture, stirring constantly. Cook 3 to 5 min. or until sauce is thickened and spaghetti mixture is heated through, stirring constantly and adding enough of the reserved pasta cooking water as necessary until sauce is of desired consistency. Remove from heat.