Why hello, spring. It’s been awhile. We’d give you the stink eye if we weren’t so happy to see you. Instead, let’s celebrate by dusting off the wicker basket and floppy flask and hitting our favorite sandwich spots for picnicking in …Prospect ParkVan Horn Sandwich Shop in Cobble Hill is just a few F-train stops away from Brooklyn’s largest outdoor mecca. Order killer Southern pimento cheese and cornmeal-breaded fried catfish sammies with a side of spicy jalapeno and scallion hush puppies. (You might want to pick up some water on your way to Long Meadow.) 231 Court Street, at Warren Street, Cobble Hill (718-596-9707 or vanhornbrooklyn.com).Central ParkThe Portuguese/Italian Henrique with alheira vinegar sausage, collard greens, and melted mozzarella at City Sandwich is well worth the fifteen-minute walk from Central Park South (or ten from Bryant Park). The Cornelia, stuffed with roasted seasonal veggies and rosemary, is delectable enough for the walk back. 649 Ninth Avenue, between 45th and 46th Streets (646-684-3943 or citysandwichnyc.com).Madison Square ParkSkip the ever-growing Shake Shack line for a greener to-go lunch from No. 7 Sub at the Ace Hotel. The broccoli, ricotta salata, and pine nut hoagie is quickly becoming legend, as is the fried clam, pickled strawberry, and frisee with roasted leek mayo. 1188 Broadway, between 28th and 29th Streets (212-532-1680 or no7sub.com).Photo: Paper Boat Creative / Getty ImagesPacking your own lunch? Try these simple recipes for a movable feast.