If you won’t/can’t go to East Rock where there’s a lot of good options (Atticus Market, Zoi’s, Olmo, Nica’s, Crepes Choupette, etc), then I’d recommend G Cafe on Chapel or Orange, Atticus by the art museums, Donut Crazy (solid sandwiches, nothing fancy), Book Trader. Maybe Bnatural Kitchen but never tried their breakfast items.