Make this recipe a recipe that people in that category can eat. categories: ['vegetarian'], recipe: melt butter; blend in flour. add vinegar, beef broth, prepared horseradish mustard, and . brown sugar. cook slowly, stirring constantly, till thick. gradually add a little hot mixture to 1 slightly beaten egg yolk. return to hot mixture. bring sauce to boiling, stirring constantly. serve hot with corned beef or ham. makes 1 cup.

Target recipe: wash beans and remove ends and strings. in a medium saucepan cook green beans in a small amount of boiling water for 20 to 25 minutes or until crisp-tender. meanwhile, for sauce, in a small saucepan stir together the yogurt and flour. stir in horseradish, mustard and celery seed. cook and stir till thickened and bubbly. cook and stir for 1 minute more. pour sauce over green beans; toss gently to coat.