Grind the ginger, green chillies, beetroot, and cumin into a smooth paste using a little water.
Heat a pan over medium flame and toast the oats until lightly browned and crisp. Transfer to a bowl and let cool.
Add the semolina to the cooled oats and grind it into a fine powder. Mix in the beetroot paste, salt, and water. Let the batter sit for 5 minutes.
Heat a non-stick tawa over medium flame. Pour a ladle of batter and spread it out into a circular shape. Drizzle olive oil and cook until both sides are slightly crisp.
Serve the Beetroot Oats Chilla hot with green chutney.