Treat your veg like you would treat an expensive piece of meat
There are many ways to treat a veg and make them shine. I found below list by Brownble.com which sums up the Cheffie techniques for home cooks really nicely. Get yourself an armfull of a veg and test all method
How do Chefs make a pretty presentation?
It is crucial to think about the plating before you start cooking. What shapes, what colours, which details? This is what Michelin Chefs do.