Boil orzo pasta according to instructions on box. Once boiled, drain the pasta and set it aside.
Cook bacon in a large skillet over medium heat until lightly browned. When done, transfer bacon to a plate and set it aside.
In a same pan that bacon was cooked in, saute onions in the bacon fat. Saute onions until soft and add chopped spinach and saute for about 1 minute or until spinach is tender. Add orzo pasta and bacon to the pan and mix well with vegetables. Once ingredients are mixed, add olive oil and salt.