Into a medium saucepan over medium heat, add olive oil. When the oil is hot, add onions.
Sauté the onions for 3 minutes, until softened.
Add the garlic and continue cooking an additional 1 minute.
Add the rice then stir to fully coat with oil.
Pour in the wine and stir continuously, until all the wine is absorbed by the rice, about 3 minutes.
1/2 cup at a time, add the vegetable broth stirring until the liquid is absorbed between each addition. Allow for 3-5 minutes between each 1/2 cup of vegetable broth.
Once all the broth is absorbed, stir in the chopped spinach.
Reduce heat to low and continue stirring occasionally until spinach is wilted.
Remove from heat then stir in the crumbled feta cheese.