Minka Kelly & Chris Evans -- The Public Makeout Session!

Minka Kelly and Chris Evans proved they're more than just friends by swapping spit outside a restaurant in Studio City on Monday.

The sexy couple -- who dated briefly in 2007 -- have been spotted hanging out together in recent weeks, but this is the first time they've gotten hot and heavy in public.

Prior to hooking up with Captain America, 32-year-old Minka broke up with her longtime NY Yankee boyfriend Derek Jeter last year.

She really knows how to play the field.