Hello, I got an oven that comes without plug. Manual says direct wiring required.

How do I connect it to the grid?

1) can I attach a 15amp round pin plug and install a 15amp 3pin socket wired to a 20a switch? Breaker rating is 240v 20amp, oven power is 3650w. By calculation the amp draw is 15.2amp already, can I do it this way?

Or

2) direct connect the oven cable to 20a switch via a junction box? But I don't know how to look for the junction box

Please help, I scare the power draw too high and cable or plug melt.