Celeriac steaks with lentils & garlic mayo

Put the celeriac steaks in a steamer over plenty of boiling water. Cover with a lid and steam for 10 minutes, until softened but not collapsing. Melt the butter and mix with the miso paste in a small bowl. Spread ½ over the celeriac. Combine ½ the garlic with the orange zest, mayonnaise and a little black pepper in a small bowl.

Put the contents of the can of lentils (including the water), the thyme, salad onions, remaining garlic and orange juice in a saucepan. Cover and cook gently for 10 minutes.

Heat a ridged griddle pan. Add the celeriac steaks, buttered-sides down, and cook for 2-3 minutes, until marked with griddle lines and starting to soften. Spread the remaining butter mixture over the top, then turn the steaks and cook for 2-3 minutes more. Season the lentils to taste and spoon onto plates. Top with the steaks and serve with the mayonnaise and an extra sprinkling of thyme.