Bring 4 cups water to a boil in a large saucepan. Add spinach and peas to pan, cook for 30 seconds.
Remove vegetables from pan with a slotted spoon and place in a large bowl.
Add noodles to pan and cook 3 minutes.
Drain; add noodles to spinach mixture in bowl.
Heat avocado oil in pan over medium-high heat.
Add shallots and the next 5 ingredients (through garlic) to pan and sauté for 1 minute, stirring constantly.
Add chicken broth to pan, and bring to a boil.
Add coconut milk to pan and reduce heat. Simmer for 5 minutes.
Add chicken, onions, sugar, and fish sauce to pan and cook for 2 minutes.