Hooray Red Line! (I am teeeechnically now a temporary resident of Roxbury, but hope to move back north this summer, and still spend a lot of time across the river.)

Dunno if you're interested in farmers' markets, but since you mentioned being in Dot :) apparently the Dorchester Winter Farmers' Market got their Kickstarter funding, so they'll be open Sundays noon-3 in Codman Square!