Order from Antonio's Authentic Portuguese Restaurant to enjoy some of the best Steak in Oceanside. Looking to find the cheapest way to order Antonio's Authentic Portuguese Restaurant? Choose the most affordable delivery option listed here. Because they deliver in Oceanside, you can enjoy Antonio's Authentic Portuguese Restaurant in the comfort of your own home. Don’t wait another day to treat yourself to their delicious Steak! Check out the full Antonio's Authentic Portuguese Restaurant menu below.