Portuguese cuisine is definitely slow food. You have to wait for the fish to grill, the clams to open, the meat to roast, or the shrimp to cook. If you’re in a hurry, Portuguese cafés offer a wide array of finger foods to eat on the go: tasty codfish cakes (bolos de bacalhau), delicious small pies (empadas), crunchy paninis (tostas mistas), and much more.
But, if you’re in need of something quick and more substantial, try a Portuguese hamburger chain called H3. They cook to order delicious hamburgers made with great ingredients. Start with the wonderful “croquetes de alheira” as a appetizer. Then, choose one of the many burger configurations, with toppings ranging from mushrooms to foie gras. You’ll see why this fast-food chain is growing so fast.
Click here for the H3 website (choose “onde” to see a list of locations).
Salt of Portugal 
Dieters beware those delicious “tostas mistas” oozing with ham & cheese are sooo good because of the great Portuguese bread & the fact they butter the bread both sides in Lisbon – yum! You’re on holiday so diet when you get back home, would be a shame to miss one of these. For more restrained persons – know that coffee shops all over the city usually make a home made soup every weekday & each day it’s a different variety, enjoy!