01 -
4 pound beef chuck roast.
02 -
2 tablespoons olive oil.
03 -
2 sweet onions, sliced 1-inch thick.
04 -
4 cloves garlic, minced.
05 -
1 ounce packet ranch dressing mix.
06 -
0.87 ounce packet brown gravy mix.
07 -
1 cup sliced pepperoncini peppers (or 8 whole), plus 1/2 cup juice.
08 -
1 stick unsalted butter.
09 -
1 1/2 cups beef broth.
10 -
Cornstarch slurry (optional for thickening).