Step 1: Gardening Supplies
All available at your local big box garden/home center for the approximate costs listed below:
Garden faucet handles - $1.50 each
#10 Washers - $1.00
#8-32, 2" brass bolts/screws - $1.00
#8-32 Brass Nuts - $1.00 (Or, brass acorn nuts)
A-3 Compression Nuts - $1.00
Step 2: Planting
With the majority of the bolt threads poking though the front of the cupboard, place one compression nut, then the faucet handle, then one washer, and screw the nut onto the bolt to hold everything together (see second photo).
The Compression nut is only there to make some space between the faucet handle and the cupboard door. Also the washer is slightly larger than the bolt (#10 vs. #8) because there is a hole through the faucet handle that I wanted to cover.
Once assembled, take a sharpie and mark the length of bolt still sticking out of the faucet, which you will need to hack saw off, carefully, using a vice or something so you don't hack saw off a finger. Or, you could just measure better than I did and get a bolt of proper length in the first place.
Step 3: Re-Planting
Oh, post photos, I ended up not liking a raw bolt sticking out of the faucet, so I used a brass acorn nut, which you can find at the same store for the same price.
Many variations to this little project. Maybe bent silverware would make interesting cabinet handles..?