Heat half of olive oil in skillet over medium-high heat until shimmering. Add garlic and shallots, saute for 1-2 minutes.
Add carrots and cook until tender, stirring frequently, about 4 minutes.
Add broccoli and mushrooms, toss to combine.
Pour in soy sauce and oyster sauce, stir together and bring to a boil. Reduce heat to medium and simmer for 2-3 minutes.
Drain off excess liquid through a colander and move vegetable mixture to a plate or pan to cool.
To a food processor add the cooked rice, walnuts, and bread crumbs. Add the vegetable mixture and the egg. Process until mixture resembles a paste.
Form mixture into 3 patties.
Heat remaining olive oil in a skillet over medium high heat until shimmering.
Add patties to the hot oil and cook until browned, about 5 minutes. Flip over and brown the other side, about 5-7 minutes.
Serve on sandwich buns with your favorite condiments.
Author: Chef Antoine Davis
5 from 3 votes
Notes
The soy sauce and vegetarian oyster sauce add loads of flavor. You can substitute the vegetarian oyster sauce with extra soy sauce if you can't find it locally.
For a vegan alternative to eggs, substitute with a flax egg which is 1 tablespoon of ground flaxseed mixed with 2 1/2 tablespoons of water.