Induction Oven Circuit
Your circuit has a few problems: 


Inductor \$L_2\$ must be connected to the \$V_1\$ and drain of \$M_2\$
The driver of both mosfets must be connected to \$V_1\$ or some controlled supply voltage, otherwise they are not going to work.


Here is a simulation with the proper connections. The circuit begins to oscillate after you apply the required control voltage to the gate of the MOSFETS.



Note: Be careful with the voltage levels and the heat.