On a plate, mix flour and chicken bouillon powder, set aside
Slice onion and veggies, separately
Heat oil in instant pot, brown beef shanks, then coat them in the flour
Using the grease, saute onion til fragrant, then add in bay leaves and veggies, stir, add in tomato paste, saute for 2-3 mins, turn off the saute feature
Top veggies with coated beef shanks, pour enough broth to cover (I like a mixture of chicken and beef broth for tastier result), and click stew options