Braised Brisket Recipe with Potatoes and Carrots

1 large beef brisket, about 5 lbs, trimmed of all fat
1 tbsp cake meal, or flour if not for Passover, rice flour for gluten-free
freshly ground black pepper
1 tbsp olive oil
4 large white onions, peeled and thickly sliced
3 tbsp tomato paste
kosher salt
4 cloves garlic, peeled and quartered
2 cups fat free beef broth
3 large carrots, peeled and trimmed 2 inches long
8 medium red potatoes, 32 oz total, quartered
1/4 cup chopped fresh parsley, for garnish