That's funny, I was thinking about doing this same thing just today and wondering how well it would work. Well now I'm going to try it for sure, thank you :)
I've been having a lot of fun with wattle garden bed edging lately. It's fast and cute. My partner is very impressed at how quickly I'm making garden beds (just made three little round ones for the kids today, they are pretty adorable). I'm using cedar stakes, and weaving in first year coppiced maple shoots, which are numerous on the property thanks to my guy taking down several maples last year.
I always end up making beds lasagna style, first with cardboard weed barrier, then chunks of rotten alder, then whatever coarse organic material I can find including unrotted compost, seaweed, partly aged manure and small bits of plants like leaves (though I don't like all the settling I get with leaves, prefer them as mulch) and then top with a relatively thin layer of topsoil or fine compost. For me, because I'm building on top of poor soil, that's as quick and easy as it gets. For two recent beds, I did also dig down so that I could bury quite a lot of wood without having a big mound. Way more work/less fun.
I've considered so many other ways of making garden beds, but keep coming back to sheet-mulch style with a low border. It's just chill.