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This tutorial is the conclusion of many experiments I went through with this special form a spoon has.
I'll do my best to go into detail, because here there are many things to be aware of. So here we go

Step 1: Draw this curve using Control Points tool, and then edit with this tool.

Step 2: Click & hold MB for the Arc submenu to pop up, then select this one and go as follows:

Holding the Shift key, determine the distance from the curve (1) and move the pointer to the other end (2). Clicking the MB ends the action and you must carefully move the pointer until you're satisfied with the angel (arrow direction).

Step 3:Now go back to the front view, use the magnifying tool at the top menu and place the arc precisely at location shown.

Step 4:Use any of these 3 buttons to regulate the 4 views (RMB is also important), switch to the right viewport and do this:

While the arc is selected, activate Transform/Array/Along Curve, point to the curve created earlier and for the number of ticks type in 18. If everything's well, you should see this in the front viewport. In the next step you'll see how this set of curves transforms into the spoon surface.

Step 5: Now click on the icon at the top menu, and you'll see everything painted yellow. Hold the Shift key and click (deselect) the curve only.

Step 6: Now go Surface/Loft and you're done with this part.

Step 7: Now, at the top view, start to create the top shape curve of the spoon (with the Control Points tool, naturally).

A few important points: 1. You must start & end the curve where the mid line is. This is because you're going to mirror it.
2. Since you're going to split one surface from another, this surface must be smaller than the other. 3. Always check accuracy with the magnifying tools. It helps a lot. Now edit the curve until you're satisfied and then check for accurate junction points at both ends. Then mirror and join both curves. When mirroring it's bets to hold the Shift key.
If it happens that Rhino says 'unable to join curves' - this is the time to go check junction points.
Step 8: Now that you've joined both curves, go Surface/From Planar Curves and turn it into a solid.

In this example you can see both the curve used to make the surface and the solid as result.
Now for the final part - split & enjoy!
Step 9: Select the surface you just made and go Solid/Extrude Surface.

Here you can see all 3 surfaces/solids: The vertical is the extruded surface, the horizontal is the initial surface you made earlier, and the one in yellow is the final spoon.

Now in the front view select the surface from the previous step, click the Split tool, then the extruded solid, and press Enter. This is what you should have.
Final step: Click button, hold Shift and click on the yellow solid, then press the Del key. All you have on the screen is the spoon. Click on the blue ball at the top menu ( Render) and enjoy.

True, this isn't the ultimate spoon, but it's in my view a good way to create it. One can play with the various curves and improve the model. In any event I'm proud to be able to hand this small contribution.

(: Have fun :)