Goulash Triestino

Name: Goulash Triestino
Ingredients: 1⁄3 cup extra virgin olive oil; 2 -3 large onions, peeled and cut in thick wedges (1 1/2 pounds); 2 teaspoons coarse sea salt (to taste) or 2 teaspoons kosher salt (to taste); 2 1⁄2 lbs trimmed boneless beef chuck or 2 1⁄2 lbs beef round steak, cut in 1 1/2-inch chunks for stewing; 2 teaspoons Hungarian paprika, sweet or hot to taste; 1 teaspoon dried oregano; fresh rosemary (1 branch with lots of needles); 3 cups cold water; 1 tablespoon all-purpose flour; 4 tablespoons tomato paste