Heat olive oil in 12 inch skillet over medium-high heat.
Add cubed chicken. Cook for 3-5 minutes turning so all sides get cooked.
Add zucchini and squash. Cook for 6-8 minutes, until all vegetables are starting to soften.
Add frozen okra, cook until vegetables are cooked through.
Add can of diced tomatoes, heat through.
Remove from heat and serve immediately.