"You must try this! It's a spinach enchilada with avocado and black beans. And this is papaya or mango, I think. Eat!" Much like any other mom, Frances Conroy is insisting that I share the food at her favorite neighborhood Mexican restaurant in Los Angeles's Silver Lake neighborhood. In this moment I feel like I'm listening to Ruth Fisher, her matronly yet always surprising character on HBO's Six Feet Under. "She's really come along in some interesting ways, hasn't she?" says Conroy about her onscreen self. "And I think this season, that will definitely deepen. Of course, I'm not allowed to say anything about what's coming. I'll get in trouble."
With the third season of the …