The actor, 58, stars in the season finale of the hit series Fargo airing June 17 on FX
Credit: Dave Kotinsky/Getty

The star and father, who is one thoughtful dude, chatted with PEOPLE this week about “one last thing” …

Last time I laughed
My daughter [Bella, 9] is in charge of watering the plants, and this morning she was holding the hose while reading a book. I just watched her and wondered when she’d realize a puddle was growing. At least she likes books!

Last indulgence
I’m a vegan and eat extremely healthy. For me, something indulgent would be to cut up two bananas into my oatmeal instead of one. I don’t eat junk at all. I wish I could have that stuff, but I’m allergic to wheat and dairy.

Last gift I purchased
For Mother’s Day I got my mom some bath oils and flowers, and I got Bella’s mom, Connie, kind of a fancy shirt and a lavender candle and earrings.

Last costume I wore
My daughter wants to be an entomologist, so everything is about insects like butterflies and caterpillars. Last Halloween she went as a monarch butterfly and I went as a ladybug. That doesn’t really look like me, but I did it. I strapped on the wings and everything.