Thanks for all the replies.
As it turned out, the squirrels did not eat all the fava beans I planted. I planted about 25, and now have ten plants.
I think I planted 10 to 15 snow peas, and now have 3 or 4 growing plants.
I planted more peas, and I am trying this:
I heard that squirrels cannot resist bare soil. They have to dig into it, even if they are burying or digging up food.
We have this sage bush that grows like mad here in Colorado. I think it's called Egyptian sage. We trimmed that down to nothing. Kept the branches, and dried them out. I broke up the branches into about 6" pieces and covered the new area with those pieces. Sun can still get though, and sprouts also have some room.
So far, I am not seeing a lot of holes. Maybe this will do it.
I thought about taking the pieces, and poking them into the soil, so it would poke anybody who tried to walk on it. But have not done that - yet.
I have also heard that squirrels will dig up onions, and garlic, even though squirrels hate onions and garlic.
Squirrels have dug up many of my seed potatoes, but the squirrels don't eat them.