I have never had it so I'm not gonna embarrass myself by offering a recipe. That said I'd breakdown the beer quality and start there. For instance...
Yeast - was it spicy, eatery, phenolic, etc and choose a yeast accordingly.
Malt - clearly it's not super dark but do you detect roasted malt character or is it like a lot of darker Belgian and German beers using a tiny amount of huskless or roasted wheat for color adjustment? Grain flavors isnit simple base malt heavy or more specialty malt derived flavor?
Water, probably soft even if firmly buttered.
Get the idea? Just take a swing at the beer properties and formulate an approximation then tweak from there!
If I were to make a big fat Belgian brown I'd go:
10% table sugar to dry it out
5% biscuit malt
8% aromatic malt
3% special b
3% debittered carafa II
71% Pilsner malt
Shoot for 1.080-90 og
Mash low, 147
Ferment with favorite Belgian yeast wlp 500 or 530
Pitch and ferment first 60 hours at 65 then let free rise into the low 70s.
Think I just talked myself into making a Belgian brown ale!