I'll Never Make Roast Beef Sandwiches Without This Topping Ever Again

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Today we're making the best roast beef sandwiches. The combination of the garlic bread with melted mozzarella and onion jam makes a sandwich that is so insanely delicious! I hope you enjoy the recipe.

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***PRINT RECIPE WITH INSTRUCTIONS AND PROCESS SHOTS***
ROAST BEEF SANDWICHES WITH ONION JAM:
https://www.sipandfeast.com/roast-bee...

INGREDIENTS WITH GRAM AMOUNTS
For the garlic rolls
1 stick (113 grams) unsalted butter
1/4 cup (57 grams) olive oil
5 cloves garlic - grated
1/4 teaspoon crushed red pepper flakes optional
1/4 cup (15 grams) flat-leaf Italian parsley - minced
salt to taste
4 large hard rolls
3 tablespoons (17 grams) Pecorino Romano - grated

For the onion jam
1/4 cup (57 grams) olive oil
3 large sweet onions diced, about 2 pounds (907 grams)
1/2 teaspoon (3 grams) kosher salt
3/4 cup (150 grams) sugar
1 cup (230 grams) balsamic vinegar
1/2 teaspoon ~(1 gram) dried thyme

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