heat olive oil in large skillet over medium to high heat. Add the onion, season with a fourth teaspoon salt. cook, stirring occasionally until beginning to soften, stir in garlic. cook 1 minute.

add ground beef, stir into onions and breaking it up until browned, stir in tomatoes and paste, oregano, red pepper flakes, and rest of salt. cook, stirring occasionally until thickened, taste to check seasonings

serve on choice of bun or roll, top with provolone cheeze slice and generous helpings of giardiniera