If using frozen fish, thaw according to package directions. Once thawed, blot dry with paper towels and season the fish with the salt.
Pour the New RAGÚ® Simply Chunky Marinara Pasta Sauce into a non-stick skillet (about 12-inches in diameter) and heat the pasta sauce until it is gently simmering.
Add the fish filets to the New RAGÚ® Simply Chunky Marinara Pasta Sauce. Cover the skillet with a lid and gently simmer the fish until the internal temperature reaches 145 degrees F. This should take about 6 - 8 minutes if your fish is fully thawed.
Transfer the fish to a clean plate and push the New RAGÚ® Simply Chunky Marinara Pasta Sauce through a strainer to remove any watery liquid left behind from the fish.
Serve the fish with the New RAGÚ® Simply Chunky Marinara Pasta Sauce, plus green olives and lemon slices, if desired.