Source: Internet and Cindy5_NY
adapted by There's Always Thyme to Cook
Arby's Horsey Sauce:
1 cup mayonnaise
3 tablespoons bottled horseradish cream sauce
1 tablespoon granulated sugar
Mix all well. Keep refrigerated, tightly covered. Will keep up to 2 weeks.
Arby's BBQ Sauce:
1 cup ketchup
2 teaspoons water
1/4 teaspoon garlic powder
1/4 teaspoon onion powder
1/4 teaspoon salt
1/4 teaspoon pepper
1/2 teaspoon Tabasco
Combine all the ingredients in a small saucepan and cook over medium heat, stirring constantly, until the sauce begins to boil. About 5-8 minutes.
Remove the sauce from the heat. Cover and allow to cool.
Pour into a covered container for refrigerator storage (keeps 4-6 weeks).
To make the sandwich you need:
onion rolls
roast beef
velveeta cheese product
Arby's sauce clones
Spread whichever sauce that you like on the onion roll, top with some roast beef slice, add the cheese, I like mine with just BBQ sauce and a lot of cheese. Put some BBQ sauce on the other slice of the roll and nuke in the microwave for about a minute, until the cheese is all melted.